My Brother Hunted Me, Not Knowing I Was His Lost Sister

I became a winged white tiger to save my brother—now he hunts me for my mutant core, not knowing I'm his lost sister. Standing beside him is a girl who's stolen everything from me. I try to approach him but he blasts me with his power, leaving a burn across my back. When he finally recognizes me, the only reversal cure has a 4.7% survival rate. I choose to risk everything to become human again, while the girl who betrayed me works to erase me forever.